Tooth-brush.



No. 860,840. PATENTED JULY 23, 1907. v V G. STRASSBURGER.

TOOTH BRUSH.

APPLICATION FILED APR. 7, 1906.

UNITED s'r 'rEs GUSTAVE STRASSBURGER, OF NEW YORK, N. Y.

TOOTH-BRUSH.

Specification of Letters Patent.

Patented m 23,1907.

Application filed April 7,1906. Serial No. 310,

'[b all whom it may concern:

Be it known that I, GUSTAVE STRASSBURGER, a citizen of the UnitedStates, and a resident of New York, in the county of New York and Stateof New York, have invented certain new and useful Improvements inBrushes, more particularly the class known as tooth-brushes, of whichthe following is a specification.

This invention relates to brushes and more particularly to such brushesas are used incleansing the teeth, and consists in so arranging thebristles that some or all may stand in a graduated relation.

The object of my invention is to provide a tooth brush wherein thebristles are so arranged as to reduce the harshness or stiffness 'of thebristles and thereby minimize the wear on the enamel, and at the sametime increase the cfiiciency of the brush.

There are two longitudinally graduated rows or bristles one on eitherside of the brush, graduating'in opposite directions in their relationsto each other from a point near one end of the brush and at a miximumheight, to a point near the other end and of a minimum height.

- In use the brush is rotated in the mouth giving the bristles an up anddown motion in their relation to the teeth and some of the bristles byreason of the graduation of the outside rows engage the spaces betweenthe teeth while other bristles rub cndwise on the enamel serving to moreefficiently cleanse the teeth.

13 y reason of the construction described the pressure upon the enamelby the bristles contacting therewith, is minimized through the abilityof the longer bristles to freely enter between the teeth withoutadditional pressure on the other bristles, necessary to so contactsame'as to secure that relative difference in length necessary to permitsimultaneously, action 'upon surfaces of different planes.

As before stated there is in the cohstruction of this brush in additionto the bristles which are graduated transversely outsiderows which arelikewise graduated longitudinally with relation to succeeding bristlesto accommodate the brush to the diversity of the formation of theincisors and cuspids and the varying depth of the openings presentedbetween these different forms of teeth. The central rows of bristlesbeing to the outside row in substantially the same relation as the frontenamel to'the depth of the space between the teeth. r

Referring to the accompanying sheet ofdrawings which forms a part ofthis specification; Figure 1 is a side elevation of a tooth brushconstructed in accordance with my invention. Fig. 2 is a perspectiveView of the tooth brush, Fig. 3 is a side elevation of the tooth brushshowing the opposite side of Fig. 1. Fig. 4 is a transverse section onthe line 4-4 of Fig. 3 looking in the direction indicated by the arrows.

-In the embodiment of my invention I provide a tooth brush having theusual handle a, to which is secured the substantially parallel bristlesb, in the usual manner and arranged in rows.

Referring to the drawing c represents the rowof bristles on one side ofthe brush graduating in height from the highest point e near the frontend of the brush to the lowest point f near theother or handle end asshown in Fig. 1.

d is the row of bristles on the opposite side of the brush to that shownin Fig. 1 graduating in height from the highest point q near the handleend to the lowest point h near the other or front end of the brush, asshown in Fig. 3. I

It will be understood that I do not wish to confine vmyself to thisparticular form of construction but several or all of the rows orbristles maybe graduated in the same or opposite directions.

Having thus described my invention what ,I claim is 1. A tooth brushhaving the height of its bristles graduated, in the outside row of oneside of the brush, from a point near the front end of the brush with amaximum height, to a. point near the other end of the brushwith aminimum height, and a similar row of bristles on the other side of thebrush but graduating in the opposite directions from those of the firstrow whereby'parallel longitudinal rows of bristles will simultaneouslycontact with'the enamel of, and enter the spaces between the teeth.

2. A tooth brush having central rows of bristles of sub-' stuntially thesame height and having outslde rows of .hristles graduated in height a.part of the length of the

